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<h1>for</h1>
<p>repat an operation n times.  If you want to run more commands than one in a for cycle, you must put them   in a user command. </p>
<h2>parameters:</h2>
<ol>
  <li>The variable, which's vallue will be modified during the for operation</li>
  <li>The start vallue</li>
  <li>The end vallue</li>
  <li>Inc or dec</li>
  <li>the command.</li>
</ol>
